US2997106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin scraper combination
Assignee: Individual
•
Filing: 1957-07-16
•
Granted: 1961-08-22
•
Expires: 1977-07-16
Abstract
No abstract record available.
Inventors
- 👤 James C Tripplehorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:33
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2712853A
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US2632795A
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US2690808A
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GB761486A
Cited
US7793917B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |